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sensor

[sen-sawr, -ser] /ˈsɛn sɔr, -sər/
noun
1.
a mechanical device sensitive to light, temperature, radiation level, or the like, that transmits a signal to a measuring or control instrument.
2.
Origin of sensor
1925-1930
1925-30; sense + -or2
Can be confused
censer, censor, censure, sensor.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for sensor

sensor

/ˈsɛnsə/
noun
1.
anything, such as a photoelectric cell, that receives a signal or stimulus and responds to it
Word Origin
C19: from Latin sēnsus perceived, from sentīre to observe
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for sensor
n.

1947, from an adjective (1865), a shortened form of sensory (q.v.).

Online Etymology Dictionary, © 2010 Douglas Harper
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sensor in Medicine

sensor sen·sor (sěn'sər, -sôr')
n.

  1. A device, such as a photoelectric cell, that receives and responds to a signal or stimulus.

  2. See sense organ.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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sensor in Technology

hardware
An electronic device used to measure a physical quantity such as temperature, pressure or loudness and convert it into an electronic signal of some kind (e.g a voltage). Sensors are normally components of some larger electronic system such as a computer control and/or measurement system.
Analog sensors most often produce a voltage proportional to the measured quantity. The signal must be converted to digital form with a ADC before the CPU can process it.
Digital sensors most often use serial communication such as EIA-232 to return information directly to the controller or computer through a serial port.
(1997-04-15)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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6
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